Published January 1, 2019 | Version v1
Journal article Open

Final results on neutrino oscillation parameters from the OPERA experiment in the CNGS beam

Creators

  • 1. Russian Acad Sci, INR Inst Nucl Res, RUS-117312 Moscow, Russia
  • 2. Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy
  • 3. Lomonosov Moscow State Univ, SINP MSU Skobeltsyn Inst Nucl Phys, RUS-119991 Moscow, Russia
  • 4. Kobe Univ, J-6578501 Kobe, Hyogo, Japan
  • 5. Univ Bern, Albert Einstein Ctr Fundamental Phys, LHEP, CH-3012 Bern, Switzerland
  • 6. Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
  • 7. Russian Acad Sci, LPI Lebedev Phys Inst, RUS-119991 Moscow, Russia
  • 8. Joint Inst Nucl Res, RUS-141980 Dubna, Russia
  • 9. Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Laquila, Italy
  • 10. Univ Savoie Mt Blanc, LAPP, CNRS, IN2P3, F-74941 Annecy Le Vieux, France
  • 11. Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy

Description

The OPERA experiment has conclusively observed the appearance of tau neutrinos in the muon neutrino CNGS beam. Exploiting the OPERA detector capabilities, it was possible to isolate high purity samples of nu(e), nu(mu), and nu(tau) charged current weak neutrino interactions, as well as neutral current weak interactions. In this paper, the full dataset is used for the first time to test the three-flavor neutrino oscillation model and to derive constraints on the existence of a light sterile neutrino within the framework of the 3 + 1 neutrino model. For the first time, tau and electron neutrino appearance channels are jointly used to test the sterile neutrino hypothesis. A significant fraction of the sterile neutrino parameter space allowed by LSND and MiniBooNE experiments is excluded at 90% C.L. In particular, the best-fit values obtained by MiniBooNE combining neutrino and antineutrino data are excluded at 3.3 sigma significance.

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